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Câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
The children ……..loudly when their parents arrived home from work.
A. were playing
B. play
C. playing
D. played
The children ……..loudly when their parents arrived home from work.
A. were playing
B. play
C. playing
D. played
Giải thích: Diễn ta một hành động đang diễn ra bị một hành động khác xen vào ( S+was/were+Ving when +S+V2/ed)
Đáp án A.